Ruzivo rwekutanga rwevashandisi
Bhizinesi rakakosha rekambani yehardware uye yezvivakwa zvekuvaka inogadzira zvakachengeteka PC kutenderera simbi, mahwendefa ekupedzisira, mitsara yemarara, yakagadziridzwa mitsara yezvinhu, 30MnSi nezvimwe zvinhu.Iyo kambani ine 4 yakanakisa mitsara yekugadzira, inoshandisa yepakati frequency kupisa uye DC inosiyana frequency drive motors, ine 2000KVA2 (inoiswa tandem).Iyo dhizaini yemagetsi system dhizaini ndeiyi inotevera:
Data chaiyo yekushandisa
Iyo chaiyo simba chinhu PF = 0.82, iyo inoshanda ikozvino 2250A, iyo huru pulse ikozvino inguva 5, uye iyo yakazara ikozvino inova 23.6%.
Simba System Situation Analysis
Mutoro mukuru wepakati frequency induction furnace, yepakati frequency induction furnace uye inverter rectifier simba rekupa ndiyo 6th pulse rectifier.Iyo yekugadziridza midziyo inoburitsa yakawanda pulse ikozvino kana ichishandura AC yazvino kuita AC voltage.Iyo harmonic yazvino inounzwa mugedhi remagetsi inogona kukonzera pulse Ikozvino inoshanda voltage, zvichikonzera kushanduka kwekushanda kwemagetsi uye ikozvino, kuisa mungozi kunaka uye kuchengetedzwa kwekushanda kwekuchinja magetsi, kuwedzera kurasikirwa kwemutsara uye kutsauswa kwemagetsi, uye kukanganisa gidhi remagetsi uye. midziyo yemagetsi yemagetsi pachayo.
Iyo program controller komputa interface (PLC) inonzwa kune harmonic kukanganisa kweiyo inoshanda voltage yekuchinja magetsi.Zvinowanzo taurwa kuti iyo yakazara pulse ikozvino inoshanda voltage furemu kurasikirwa (THD) isingasviki 5%, uye yega pulse ikozvino inoshanda voltage kugadzirwa kana kushanda, zvichiita kuti pave netsaona huru yemhosva yekugadzira.Naizvozvo, iyo yakaderera-voltage reactive simba kubhadharwa kwesefa ine basa repulse ikozvino sefa inofanira kushandiswa kubhadhara reactive mutoro uye kugadzirisa simba chinhu.
Sefa reactive simba muripo wekurapa chirongwa
Zvinangwa zveutongi
Dhizaini yemafirita muripo wemidziyo inosangana nezvinodiwa zveharmonic kudzvinyirira uye reactive simba kudzvinyirira manejimendi.
Pasi peiyo 0.4KV sisitimu yekushandisa modhi, mushure meiyo sefa yekubhadhara midziyo yaiswa mukushanda, iyo pulse ikozvino inodzvinyirirwa, uye mwedzi wepakati simba chinhu chiri kutenderera 0.92.
High-order harmonic resonance, resonance overvoltage, uye overcurrent inokonzerwa nekubatanidza kune sefa muripo webazi redunhu hazvizoitiki.
Dhizaini Inotevera Mitemo
Hunhu hwesimba Public grid harmonics GB/T14519-1993
Simba remhando Voltage fluctuation uye flicker GB12326-2000
General tekinoroji mamiriro eyakaderera-voltage reactive simba muripo mudziyo GB/T 15576-1995
Low-voltage reactive power compensation device JB/T 7115-1993
Reactive simba muripo wehunyanzvi mamiriro JB/T9663-1999 "Low-voltage reactive power automatic compensation controller" kubva kune yakakwira-order harmonic yazvino muganhu kukosha kwe low-voltage simba uye zvemagetsi midziyo GB/T17625.7-1998
Electrotechnical mazwi Simba capacitors GB/T 2900.16-1996
Low voltage shunt capacitor GB/T 3983.1-1989
Reactor GB10229-88
Reactor IEC 289-88
Low-voltage reactive power compensation controller order tekinoroji mamiriro DL/T597-1996
Low-voltage magetsi enclosure giredhi yekudzivirira GB5013.1-1997
Yakaderera-voltage yakakwana switchgear uye kudzora midziyo GB7251.1-1997
Mazano ekugadzira
Zvinoenderana nemamiriro chaiwo ekambani, kambani yakagadzira seti yakadzama reactive simba remuripo zvirongwa zvepakati frequency induction choto uye inverter magetsi.Tichifunga nezvekuremerwa simba chinhu uye pulse ikozvino sefa, A seti yefirita yakaderera-voltage reactive simba muripo, kusefa iyo pulse ikozvino, kubhadhara reactive mutoro, uye kunatsiridza simba chinhu.
Mukuita kwese kweyepakati frequency induction furnace uye inoshandura, zvikamu zvese zvinogadzira 6K pulse currents, izvo zvinoshandurwa zvinoenderana nekuyerera kwazvino kweFourier series, uye hunhu hwekupuruzira mafungu anogadzirwa pa5250Hz uye 7350Hz.Naizvozvo, pakugadzira sefa reactive simba muripo, iyo yakapfava yekutanga uye 350Hz frequency dhizaini dhizaini inovimbisa kuti iyo sefa yekubhadhara magetsi emagetsi emagetsi inonzwisisika uye iyo sefa pulse ikozvino kubuda kwemagetsi muripo inovandudzwa kuvandudza simba remagetsi kuitira kuti system software pulse ikozvino ive. zvinoenderana neGB/T3 pamwe chete.
dhizaini basa
Iyo yakapfava yekutanga uye yakapfava yekutanga simba chinhu cheboka rega rega re2000KVA shanduri inobhadharwa kubva pa0.8 kusvika 0.95, iyo yechishanu pulse ikozvino yakaderedzwa kubva 420A kusvika 86A, 7th pulse ikozvino yakaderedzwa kubva 230A kusvika 46A, uye sefa muripo wemidziyo inoda kuiswa nevhoriyamu ye1060KVar.Iyo sefa yakakamurwa kuita mapoka matanhatu, iyo firita muripo inoshandiswa kune yakapfava yekutanga uye ballast switching magetsi, iyo sefa yakakamurwa kuita 5 nguva, 7 nguva, uye iyo sefa yekubhadhara magetsi emagetsi emagetsi inoshandurwa otomatiki kuti itarise yepakati frequency induction choto. , sefa uye reactive simba Muripo wekugadzira dhizaini zvirongwa.
Iyi dhizaini inovimbisa zvizere kuti iyo harmonic control inoenderana neyenyika standard GB/T 14549-93, uye inogadzirisa iyo simba chinhu chepakati frequency choto uye frequency converter pamusoro pe0.95.Sezvinoratidzwa pasi apa:
Effect analysis mushure mekuiswa kwefirita muripo
Muna Chikumi 2010, iyo yepakati frequency furnace uye frequency converter filter reactive power compensation device yakaiswa uye yakaiswa mukushanda.Chishandiso chinoteedzera otomatiki shanduko yemoto wepakati frequency fureji uye frequency converter, uye chaizvo inobvisa yakakwira-odha harmonics kubhadhara reactive simba uye kugadzirisa simba chinhu.mashoko sezvinotevera:
Harmonic spectrum distribution diagram
Rodha Waveform
Mushure mesefa yekubhadhara mudziyo waiswa mukushandiswa, iyo simba factor inoshandura curve mushure mekunge sefa yekubhadhara mudziyo waiswa mukushandiswa ingangoita 0.97 (iyo yakasimudzwa chikamu chingangoita 0.8 kana mudziyo wemuripo wesefa wabviswa)
Rodha kushanda
Ikozvino inoshandiswa neseti yega yega ye2000KVA transformers yakaderedzwa kubva ku2250A kusvika ku1860A, kudonha kwe17%;mushure memuripo, kukosha kwekuderedza kurasikirwa kwesimba ndeyeWT=△Pd*(S1/S2)2*τ*[1-(cosφ1/cosφ2)2]=24 ×{(0.85×2000)/2000}2×0.4≈16 (kw h) Muchidimbu, Pd ndiko kurasikirwa-pfupi-kurasikirwa kweshanduko, inova 24KW, uye kuchengetedza kwegore kwemari yemagetsi ndeye 16 * 20 * 30 * 10 * 0.7 = 67,000 yuan (maererano neBasa 20 maawa a zuva, mazuva makumi matatu pamwedzi, mwedzi gumi pagore, 0,7 yuan pakilowatt-awa);mabhiri emagetsi akachengetwa nekuda kwekuderedzwa kweharmonic: Kurasikirwa kunokonzerwa neharmonic ikozvino kune transformer kunonyanya kuwedzera kurasikirwa kweferromagnetic uye kurasikirwa kwemhangura, Kurasikirwa kweferromagnetic kune hukama nesimba rechitatu reiyo harmonic yazvino frequency.Kazhinji, 2% ~ 5% inotorwa muinjiniya, uye 2% inotorwa kune yakagadziriswa mitoro, kureva: WS = 2000 * 6000 * 0.7 * 0.02≈168,000 yuan, ndiko kuti, yegore Chengetedza magetsi (6.7 + 16.8) * 2=47 (10,000 yuan).
simba factor situation
Kodzero yekambani yese yakawedzera kubva pa0.8 kusvika 0.95, uye kodzero dzepamwedzi dzakachengetwa pa0.96-0.98, paine mubairo wekuwedzera we6,000-10,000 yuan.
Zvese mune zvese, iyo yakaderera-voltage reactive simba muripo weMFF uye VF mafirita ane akanakisa mafirita uye anodzosera mitoro inoshanda, inogadzirisa dambudziko re reactive simba zvirango, inowedzera kubuda kwemagetsi emagetsi, inovandudza kunaka kwesimba, inovandudza hunhu hwemagetsi akaiswa. midziyo, uye inoderedza kushanda kwesimba muripo Kushandiswa, kuvandudza kushanda zvakanaka, zvakakosha zvehupfumi kune kambani, mari nekudzoka kwerisingasviki gore kune vatengi, etc. Naizvozvo, kambani inogutsikana zvikuru nemubhadharo wepakati frequency induction choto. uye iyo sefa reactive mutoro weiyo inverter magetsi, uye ichaunza vatengi vazhinji mune ramangwana.
Nguva yekutumira: Kubvumbi-14-2023